What two numbers multiply to -840 and add up to -206?

Here we answer the question: "What two numbers multiply to -840 and add up to -206?"

The answer to your question is:

-210 and 4

Below we illustrate and prove that -210 and 4 multiply to -840 and add up to -206:

-210 × 4 = -840
-210 + 4 = -206

Are you asking because you are trying to figure out how to factor the following quadratic equation?

x² - 206x - 840 = 0

If so, the solution to factor the quadratic equation above is:

(x - 210 ) (x + 4)

To summarize, since -210 and 4 multiply to -840 and add up -206, you know that the following is true:

x² - 206x - 840 = (x - 210 ) (x + 4)

Multiply To One Number and Add Up To Another
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